At a time when immigration and ethnic relations issues are hotly disputed across Europe, and challenged by minorities and xenophobes, the explicit aim of this collection is to present substantive cross-national contributions on this new quality of contentious politics. That European countries have dealt with the integration of minorities in different ways, often bound up in conceptions of nationhood and citizenship traditions, indicates that research will benefit from more systematic cross-national comparisons. Secondly, the new contentiousness of immigration and ethnic relations politics points to a need for more systematic linkages between policy analyses and the public conflicts that are mobilized by xenophobic, minority, and anti-racist movements. Thirdly, since the topics of the extreme right and ethnic minorities have been largely dealt with as distinct fields, a greater cross-thematic conceptualisation is necessary The book divides into four parts. In the first, authors offer conceptual approaches to migration and ethnic relations politics drawing strongly on cross-national observations. Parts two and three are empirical analyses based on a method of systematic cross-national comparison. Whereas the institutionalised aspects of immigration and ethnic relations politics are the topic of part two, the third focuses more on the public contentious dimensions. Finally, in light of the important claims that nation-states are no longer the significant framework of reference for politics in a globalizing world, the contributions to part four address the emergence of the transnational level of political authority and its implications for national and sub-national politics, and challenges by social movements.